10
3.2.8
Continuous management is performed through regular inspection according to Table 2.
Table 2 Inspection items for electrical equipment with explosion-proof structure
_”d, e, n”
Ex “d”
Ex “e”
Ex “n”
Content
Inspection grade
D
e
t
a
i
l
s
P
r
o
x
I
m
i
t
y
N
a
k
e
d
e
y
e
D
e
t
a
i
l
s
P
r
o
x
I
m
i
t
y
N
a
k
e
d
e
y
e
D
e
t
a
i
l
s
P
r
o
x
I
m
i
t
y
N
a
k
e
d
e
y
e
A
Instrument
1
The instrument meets the requirements of the EPL in that
location.
o
o
o
o o o o o o
2
Device groups are appropriate.
o
o
o o o o
3
The temperature rating of the device is appropriate.
o
o
o o o o
6
There is no unauthorized alteration.
o
o
o
7
There is no unauthorized change to the naked eye.
o
o
o o o o
13
The electrical connections are well coupled without slack.
o
o
15
Internal shut-off and sealing devices are not damaged.
o
B
Environment
1
No excessive accumulation of dust or mud.
o
o
o
o o o o o o
2
The device is adequately protected from corrosion, weather,
vibration and other adverse conditions.
o
o
o
o o o o o o
3
The electrical insulator is clean and dry.
o
o
When inspecting each electric device with a explosion-proof structure, do not open it during power
supply. After performing maintenance of the appliance, observe or inspect the inspection items in
Table 1 before applying power, and use it after assembling the product for the first time.
3.2.9
Cautions
3.2.9.1
Do not open the main body(cover) of the explosion-proof electric device when
performing an inspection while energizing.
3.2.9.2
When performing repairs in a explosion-proof area, be careful not to cause shock
flames from tools, etc.
3.2.9.3
When performing maintenance and repair, disassembly and assembly work related to
the explosion-proof electrical equipment shall be carried out, so that the explosion-
proof performance shall not be lost not only to repair the target but also to other
parts.
3.2.9.4
If maintenance and fault diagnosis cannot be handled or determined by the user,
contact the manufacturer.
3.2.9.5
“Connect cables in non-explosive areas”